This suggested that mutant Doc domains with one destabilized binding mode were still able to recognize fluorescent protein fused Coh with strong affinity by relying on the alternative binding mode that was preserved.
On the basis of our MD simulations, we designed four CYP3A4 mutants, each with putative stabilization of the CBZ molecule in a predicted productive binding mode that was aimed at increased affinity for CBZ and increased turnover of the epoxide product.
Together, the docking results showed that SPGB3N adopted a binding mode that was consistent with other choline-containing substrates of hBChE, although the distance between the active site serine and the nerve agent phosphorus atom suggested that this precomplex was not reactant-like for the phosphonylation reaction.
Co-crystallization of the most potent analog TxIA(A10L) with Ac-AChBP identified a new α-conotoxin binding mode that was stabilized by a critical salt bridge between Arg5-TxIA(A10L) and a highly conserved Asp residue on the principal face of the binding face of Ac-AChBP.
The heavy-atom RMSD of ligand in X with respect to the crystal structure is 2.0, 1.3, 0.7, and 1.0 Å, respectively, for FABP4 ACD, FABP4 ANS, FABP4 TGZ, and FABP4 AOB after alignment of protein structures, indicating the successful reproduction of the binding mode that was experimentally determined.
In the most frequent binding mode that was generated for core fragment B in the kinases of the docking panel the exocyclic amino group pointed toward the gatekeeper and the nitrogen atom bridging the heterocycles was placed next to the hinge region.
This result suggests that the most potent inhibitor in this series, compound 15, has a binding mode that is highly correlated with the conformation of naproxen inside COX-2 active site.
Nitrogen incorporation is hypothesized to increase the stability by coordination of nitrogen to the heme iron of cytochrome P450, a binding mode that is referred to as type II binding.
The inhibition curves suggest a binding mode that is competitive with cAMP for the catalytic site of the enzyme, consistent with the docked models (Fig. 2).
In the MD simulations carried out with a single CBZ molecule, the most populated cluster displays a productive CBZ binding mode that is compatible with the epoxidation reaction.
However, the flexible side chain docking produces an optimal protein conformation and ligand binding mode that is entirely consistent with SAR from biochemical enzyme inhibition data.
